TITLE: GCN CIRCULAR NUMBER: 24202 SUBJECT: LIGO/Virgo S190425z: Liverpool Telescope non-detections of ATLAS candidates DATE: 19/04/26 01:08:30 GMT FROM: Daniel Perley at Liverpool JMU D. A. Perley and C. M. Copperwheat (LJMU) report: We acquired a short sequence (40 seconds each in g/r/i filters) of imaging at the locations of all five of the marginal ATLAS transients reported by McBrien et al. (GCN 24197) using IO:O on the 2m Liverpool Telescope. We do not detect a significant source at the location of any of these transients. Approximate 3-sigma upper limits (AB, calculated relative to SDSS or PS1 secondary standards) are: Name JD magnitude AT2019eao 2458599.47986 g > 22.1 AT2019eao 2458599.48069 r > 22.1 AT2019eao 2458599.48150 i > 21.2 AT2019ebn 2458599.49142 g > 22.1 AT2019ebn 2458599.49225 r > 22.2 AT2019ebn 2458599.49306 i > 21.8 AT2019ebm 2458599.51188 g > 22.3 AT2019ebm 2458599.51272 r > 22.0 AT2019ebm 2458599.51353 i > 21.7 AT2019ebl 2458599.51785 g > 22.3 AT2019ebl 2458599.51869 r > 22.1 AT2019ebl 2458599.51950 i > 21.8 AT2019dzv 2458599.52163 g > 22.2 AT2019dzv 2458599.52246 r > 21.7 AT2019dzv 2458599.52328 i > 21.7 DisclaimerNone